(1) At present, the research and development of ceramic bearings and ceramic ball bearings in China are owned by Shanghai Institute of silicate, Shanghai Institute of materials, Shandong Institute of ceramics, Guangdong University of technology, Tianjin University, Luozhou Institute, etc. Domestic ceramic bearing manufacturers are mainly distributed in Beijing, Shanghai, Zhejiang and Hebei. Besides some samples made by Luozhou Institute and Shanghai Silicate Institute, no industrialized enterprise has been found. Compared with foreign countries, the development situation of ceramic bearings in China is not optimistic. There are few domestic enterprises that can produce ceramic bearings on an industrial scale. Of course, the root cause is the influence of many factors, such as the level of technology, talent, capital, etc., especially the unclear market and lack of confidence. At present, there are still several problems in the research and development of ceramic bearings and ceramic ball bearings in China, which seriously restrict the development of ceramic bearings and ceramic ball bearings in China.
(2) Problems in the research and development of ceramic bearings and ceramic ball bearings in China
First of all, what we see now is the research and development of high-speed and high-precision ceramic ball bearings, and most of them focus on silicon nitride balls. The main problems to be solved are: one is the research on the blank making of ceramic balls, the other is the research on the processing technology of high-precision ceramic balls. In the use of high-speed machine tools, CNC machine tools, motorized spindle and other high-speed occasions, such as long life or low noise The research on new materials such as SiC, ZrO2, ZTA, Sialon and so on is still small. The production practice has proved that most of the manufacturers use ZrO2. Due to cost concerns, good materials and technology can not be used on a large scale. The low noise, dry friction, anti-static ceramic ball bearing produced by Hebei haice Ceramic Co., Ltd. and the same specification ceramic ball bearing produced by Japan NMB company have been compared in detail. The difference in decibels is 2 dB. A good product can achieve 20dB. It is the same as foreign products. But the price is only about 15% of NMB. It can be directly matched with the motor of domestic household appliances. But the price is still much higher than that of ordinary bearings, which can only be used in high-end and export household electrical appliances.
Secondly, the production of ceramic bearings and ceramic ball bearings is the industrial combination of high-tech ceramics and bearing manufacturing technology. If the problem of industrial combination of ceramics and bearings is not solved, it is empty talk to realize high-quality mass production and low-cost production to meet the market demand. At present, the domestic enterprises that can produce bearings can not manufacture ceramic materials, and the enterprises that can produce ceramic materials can not manufacture bearings. At present, some bearing manufacturers have little knowledge about ceramic bearings and ceramic ball bearings, especially the research on ceramic material science and engineering. People are familiar with the surface content of ceramic bearings and ceramic ball bearings. A kind of bearing made of ceramic material is ceramic bearing, adding ceramic ball is ceramic ball bearing. Domestic ceramic bearings and ceramic ball bearings can only be used in the environment of corrosion resistance, electric insulation, magnetic insulation, low speed and light load. There is also a big problem in the manufacturing of domestic ceramic materials. Under the premise that the process and technology have not passed the standard, the blind pursuit of low price results in the performance of materials can not achieve the expected effect. It makes the development of ceramic bearings and ceramic ball bearings go astray, and also causes more users to lose confidence in ceramic bearings and ceramic ball bearings.
Moreover, as the research and development of high-tech products, it has to go through two stages of technology intensive investment and capital intensive investment. The industrialized production of ceramic bearings not only needs to overcome many technical difficulties and use problems, but also needs large capital investment, and also needs to grasp the market positioning. It requires people of insight in the industry to take the development of domestic ceramic bearings and ceramic ball bearings as their own responsibility. Low price competition is bound to lead to rough manufacturing and further deterioration of the market. The accumulation of original capital and continuous reinvestment must serve the development of ceramic bearings and ceramic ball bearings to higher quality fields. At present, the development of ceramic bearings in China is characterized by scattered, fragmented, small-scale localized production, lack of overall awareness and macro strategic thinking.